World 15-3 (Super Mario Maker for Nintendo 3DS)
From the Super Mario Wiki
World 15-3 is the third level of World 15 of Super Mario Challenge from Super Mario Maker for Nintendo 3DS.
As the level starts, the player encounters a Goomba. After the Goomba are two house structures. Both are the only round houses, but the second house is skinnier. They are made up of Hard Blocks as the main structure, Ice Blocks as windows, Mushroom Platforms as roofs, Warp Pipes as chimneys, and Cloud Blocks as smoke. If the player goes into the Warp Pipes, they end up inside a larger version of the house. In the first house is a Big Goomba with a Key and a Pipe that regular Goombas come from. If the player goes in the nearby Key Door rewards them with sixteen coins in a pyramid-like form. In the second house are Donut Blocks and a ? Block containing a Super Mushroom. A Chain Chomp, a red Koopa Paratroopa, and three Brick Blocks are found in between the second and third houses. The third, fourth, and fifth houses are rectangular and have many windows, and Brick Blocks for roofs. The third house has a Note Block near it and a Warp Door, which takes the player inside the house, though they can escape by walking out. In between these houses are a Brick Block containing a Vine, and between the latter two, a ? Block containing a Super Mushroom on a Fire Flower. In the skies above the roofs are a few coins, Spiky Parabuzzies, and a red Koopa Paratroopa. The third house's Pipe gives ridable Lakitu's Clouds. Inside the fifth house, a red Koopa Troopa and two different colored Big Koopa Troopa. The green Big Koopa Troopa has the Key for the nearby Key Door, which rewards the player twenty coins. In between the fifth and sixth houses are Bumpers above tracks, a Conveyor Belt going left, a car made of pink Note Blocks, Ice Blocks, and Bumpers with Cloud Blocks like smoke, a Red Koopa Paratroopa, and a Goomba. The sixth house is shaped like a backwards L. There is a Warp Door that takes the player to the other side of the house. To actually go inside the house, the player must take the Warp Pipe. Inside the house are Thwomps with the biggest one holding a Key. To defeat the Thwomps, the player must make the Thwomps fall unto Donut Blocks then POW Blocks. Taking the key door rewards the player twelve coins. In between the sixth and seventh houses are Ice Blocks making T with two downward ends above a row of Brick Blocks, two different color Cheep Cheeps on tracks, and a Monty Mole. Taking the pipe near the Monty Mole takes the player to an area with two large Monty Moles, a normal Monty Mole, three coins, and some vines. The seventh house is a big house with Cannons on the sides. To get through, the player must either take two sets of Warp Doors and avoid a Piranha Plant and three sets of two Brick Blocks or go above the house and avoid a Hammer Bro. Unlike the other houses, this house has two Warp Pipes. The left Warp Pipe takes the player to an area where Bowser and Bowser Jr., the later on Note Blocks above Brick Blocks, await the player. The nearby Lifts on tracks will take the player to a Super Star and a Pipe that gives Super Stars. If the player defeats Bowser Jr., they are rewarded with a Key. The right Warp Pipe takes the player to a small area with a Chain Chomp and a Key Door. Using the Key on the door will reward the player with thirty coins. After the seventh house is the Goal Pole.